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29 May, 09:26

The rectangle below has an area of x^2-16 square meters and a width of x+4 meters. What expression represents the length of the rectangle?

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  1. 29 May, 09:30
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    Area=LW

    x^2-16=L (x+4)

    remember difference of 2 perfect squares to factor x^2-16

    (x-4) (x+4) = L (x+4)

    divide both sides by (x+4)

    x-4=L

    legnth=x-4
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